Stabilizer block



FIG. 1 is a perspective rear view of the design;

FIG. 2 is a rear plan view of the design;

FIG. 3 is a front plan view of the design;

FIG. 4 is a side elevation view of the design; and,

FIG. 5 is a top view of the design. 

The ornamental design for a stabilizer block, as shown and described. 